Shot hole disease on Prunus laurocerasus caused by Neofusicoccum parvum in Serbia

Between 2010-2014 symptoms of a shot hole disease were observed on cherry laurel (Prunus laurocerasus L.) trees and shrubs in parks and other public plantings in Belgrade, Serbia. Ten symptomatic leaves were collected from each of the diseased plants and the associated fungus isolated and identified using multi-gene phylogenetic analyses and asexual morphological characters. The pathogen was identified as Neofusicoccum parvum. The same symptoms were produced when the pathogen was inoculated on test plants. To the best of our knowledge, this is the first report of N. parvum causing shot hole disease on P. laurocerasus.Tree Protection Co-operative Programme (TPCP), the University of Pretoria (South Africa), the Ministry of Education and Science of the Republic of Serbia (TR37008), European Cooperation in Science and Technology (COST) Actions Pathway Evaluation in Pest Risk Management In Transport (PERMIT FP1002) and A global network of nurseries as early warning system against alien tree pests (Global Warning FP1401).http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1439-03292017-12-31hb2017Microbiology and Plant Patholog

The test of eight tree species resistance to the attack of Armillaria mellea and A. ostoyae by artificial infection

In the forest ecosystems in Serbia five Armillaria species are present. Understanding differences in the pathogenicity of Armillaria species to the tree species is of a great importance for the foresters. The aim of study was to test susceptibility of eight forest tree species to attack of Armillaria mellea and A. ostoyae. The sticks of Hazel previously infected with mycelium of two Armillaria were placed next to the root collar of two years old seediling. In the period of eighteen months health status of tested seedlings was observed. Differences in susceptibility among tested tree species was observed, while there was no difference in the pathogenicity between Armillaria mellea and A. ostoyae. The most susceptible species were Serbian Spruce, Common Fir, Scots and Austrian Pine, following by Spruce and Douglas Fir, while more resistant were Pedunculate and Sessile oak

Test of resistance of Populus x euramericana cv. Pannónia to the attack of Discosporium populeum (sacc) Sutton in the conditions of Gornje Potisje

The simple crossing of different poplar species enables a relatively easy method of obtaining the new cultivars and clones by artificial selection combined with production characteristics. The first step in the study of resistance of the newly selected individuals to parasites is the artificial infection of the control plants. If the plant shows the adequate degree of resistance, it is introduced to individual sites and its behavior to the pathogen is monitored in the conditions of natural infections. After the tests with artificial infections, the cultivar Populus x euramericana cv. Pannónia showed satisfactory results, so its monitoring was continued in the plantation production. This paper presents the study of this cultivar resistance to the infections by the fungus Discosporium populeum in natural conditions. Based on the study results, the cultivar Pannónia can be recommended for use, especially at the sites with poorer hydrological characteristics

Distribution of Heterobasidion genets on a Norway spruce site: Case study in National park 'Kopaonik'

Heterobasidion annosum s.l. causes great economic loss in coniferous forests worldwide. Recent studies showed that three European Heterobasdion species are present in forest ecosystems in Serbia. Aim of this study was to find which Heterobasidion species are present in studied Norway spruce stand (National Park 'Kopaonik'), to identify Heterobasidion genets, and present distribution of genets

Mycoflora diversity in the stands and plantations of poplars in the section Aigeiros

The saprophytic and parasitic fungi were inventoried in poplar stands and plantations in Serbia. During the four-year study, the material was collected from different localities in order to assess the density distribution and significance of individual fungal organisms occurring in the plantations on different clones and cultivars, but also in other stands of native poplars in the section Aigeiros

Possibility of parasite (Marssonina brunnea (Ell. & Ev) P. Magnus and Melampsora spp) control on poplar foliage with some fungicides

The aim of this study was to test the protection of the clone Populus deltoides cl. S-6-36, with several fungicides, against the loss of height and diameter increment. The idea was to protect the leaf immediately from the beginning of vegetation growth against the attack pathogens. By the planed treatments, the foliage would be protected against the fungal attack during the first two to three months of vegetation growth, which would presumably contribute to avoid the significant decrease of height and diameter increments. The most efficient fungicide during the two-year research, both in the control of the fungus Marssonina brunnea, and in the control of Melampsora spp., was Bakarni kreč 50 (cupric oxychloride). This was concluded based on the lowest average number of formed acervuli, i. e. uredosori per cm2 of leaf area. A significant decrease of poplar tree increment occurs if the intensity of parasite attack on the foliage is high and if the attacks are repeated several years successively. Under the moderate attack of these pathogens (Marssonina brunnea and Melampsora spp) there is no significant loss of height and diameter increments

Role of Armillaria species on tree dying in Turkey oak and Hungarian oak forest in Lipovica

The species and population structure of Armillaria species were studied in Turkey oak and Hungarian oak forest. Two species were observed, Armillaria gallica and A. mellea. Armillaria mellea was found on only one tree, and A. gallica was found on seven trees. Four gewets of A. gallica were observed of which two were represented only by one isolate each, while two covered the area of 5 and 9 areas respectively

Effect of temperature on conidial germination and growth of the fungus Discosporium populeum (Sacc) Sutton

Dothichiza, poplar canker, due to its significance in the establishment of intensive poplar plantations, has been drawing attention for already a long time. The aim of the test was to study some of the most important physiological characteristics of the fungus, such as conidial germination germ tube growth and growth of mycelium at different temperatures on the isolates from north Potisje and to compare the study results with the domestic and foreign literature sources. The aim of this study was not to identify the different lower systematic categories, but to identify the differences between individual isolates - populations, depending on the most significant ecological factors, such as temperature